Forming and shearing tools



July 5, 1955 G. s. KONTRA, SR

FORMING AND SHEARING ATOOLS Filed Jan. 2, 1953 2 Sheets-Sham l July 5, 1955 G. s. KONTR, sR 2,712,253

FORMING AND' SHEARING TOOLS Filed Jan. 2. 1955 2 Sheets-Sheet 2 IN V EN TOR.

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MOM-b@ ym nited States Patent n FRMING AND SHEARING TOOLS George S. Kontra, Sr., Oshkosh, Wis.

Appication January 2, 1953Serial No. 329,365

1 Claim. (Cl. til- 15) This invention relates to'improvements in forming and shearing tools, and more particularly to tools for cutting and forming speedometer cables and attaching ferrules thereto.

speedometer cable ends are ordinarily square in crosssectional shape to afford a driving connection with rotatable members having square cable receiving recesses therein. Speedometer cables for diiierent makes of cars and trucks vary in length, and theretofore it has been necessary for a garage man to keep a relatively large stock of speedometer cables on handin order to service all makes of cars. Speedometer cable is available in bulk rolls, but heretofore there has been no satisfactory tool with which a garage man could square the endsof a selected length of cable after it has been cut from a roll.

Certain types of speedometer cables are equipped near their ends, with ferrules which are crimped on. This further complicates the problem of providing replacement speedometer cable'from bulk cable rolls, and heretofore there has been no satisfactory tool for fixing such ferrules to a Vselected length of cable.

With the above in mind, it is a general object of the present invention to provide an improved tool havingfa pair of forming jaws and having a manually loperable actuating linkage capable of exertingsuflicient force on said jaws to cause the latter to form a portion of cable positioned between said jaws to a selected shape.

A more specific object of the invention is to provide an improved tool of the class described wherein the jaws are formed with a pair of complementary, open-ended, rectangular, V-shaped forming grooves.

A further specific object of the invention is to provide an improved tool of the class described, which is provided with a pair of shearing blades adapted to cut speedometer cable, said tool also having means for preventing relative transverse movement of said blades during a shearing operation.

Another specific object of the invention is to provide an improved tool of the class described having a pair of removable complementary forming dies which are adapted to square the cable and crimp fittings thereon.

A further object of the invention is to provide an improved tool of the class described having additional means for crimping fittings on a speedometer cable and having a gauging shoulder for accurately positioning a fitting on the cable during a crimping operation.

A further object of the invention is to provide an irnproved tool of the class described which is portable, durable, simple in construction, efficient in operation, and otherwise well adapted for the purposes described.

In the drawings accompanying and forming a part of this specification, in which one complete embodiment of the preferred form of the invention is shown, and in which like characters of reference indicate the same parts in all of the views:

Fig. 1 is a fragmentary side elevational view of the improved tool with the jaws thereof in closed position;

2,712,253 Patented July 5, 1955 rice Fig. 2 is an end elevational view of the improved tool as viewed from the right in Fig. 1; and

Fig. 3 is a fragmentary side elevational view ofthe improved tool showing the jaws thereof in open position.

Referring more particularly Vto the drawings, the numerals 10 and 11 indicate a pair of cooperable, vfiat, generally semi-oval shaped jaws. One end of the jaw 11 is formed on each side with an upstanding transversely apertured lug 12, said jaw also being formed with a recess 13 between said lugs. The jaw 10 is formed with a downwardly projecting apertured lug 14 which is positioned in the recess 13. The jaws 10 and 11 are pivotally connected by a pin 15 positioned in the apertures of the lugs 12 and 14, aspshown. The end portions of the pin 15 are formed with suitable vcircumferential grooves to receive snap retainer rings 16 outwardly of the lugs 12.

The jaws 10 and '11 are formed at the end opposite their pivotal connection with flat longitudinally extending surfaces 17 and 18 (Fig. 3) which abut in coplanar relationship when the `jaws are closed as shown in Fig. 1. The surfaces 17 and 18 are formed respectively with longitudinally extending complementary rectangular V- shaped forming or crimping grooves 1.9 and 20. As shown in Fig. 2,the grooves 19 and 2t) form a cavity which is square in cross-section when the surfaces 17 and 1S abut.

The jaw 11 `is provided with a gauging shoulder in the form of an upstanding pin 2-1 (Figs. 2 and 3) which is positioned in the groove 20. The jaw 10 is formed with arecess 22 in which aportion of the pin 21 is receivedwhen 'the jaws 10 and 11 are closed, as shown in Fig. f1. The vjaw 11 is also formed in one side with a transverse rectangular groove 23, and a at shearing blade 24 is fixed in said groove by countersunkfscrews 25 threaded into the jaw 1.1. The `blade 24 preferably has a thickness substantially equal to thedepth of the groove 23 Vso that Ithe outerA surface of saidV blade is flush with the adjacent surface of the jaw 11. l

Fixed :to the `side of the jaw 10, as bycountersunk screws 26, isa flats'hearing blade 27 which is positioned to `slidabll overlap the shearing blade 24. VThe upper edge .of the blade 124 is preferably flat, whereas the-cooperating lower edge .of the-blade 27 isvof inverted V- shape, as shown. The jaw 10 is formed with a lug V28 on the iside toppositethe blade `27. The lug v`28 projects toward the :'jaw S11 and slidably engages theadjacent side wall of said jaw. The slidable engagement of the lug 28 with the side of the jaw 11 prevents lateral movement of the jaw 11 to the right (in Fig. 2) relative to the jaw 10, during a shearing operation.

Adjacent the lugs 12, the jaws 10 and 11 are provided with rectangular cut away portions 29 and 30 to receive a pair of rectangular complementary forming dies 31 and 32. The dies 31 and 32 are removably held in operative position in cutouts 29 and 30 by cap screws 33 and 34 extending therethrough and threaded into the jaws 10 and 11 respectively. The dies 31 and 32 are formed with complementary forming grooves 35 and 36, as well as grooves 37 and 38. The grooves 35 and 36 are of rectangular V-shape and form a cavity which is square in transverse cross-section when closed. The grooves 37 and 38 preferably each have a V-shaped portion and a semi-cylindrical portion as shown. The dies 31 and 32 are so positioned that the grooved surfaces thereof abut in coplanar relationship when the jaws are in the closed position shown in Fig. l.

A bifurcated toggle lever 39 has a pair of spaced L- shaped arms 40 and 41, and it also has an elongated handle 42. The jaw 10 has an integral elongated handle 43 projecting longitudinally from the end of said jaw adjacent the lug 14. The handles 42 and 43 extend in the same general direction when the jaws 10 and 11 are closed. The arms 40 and 41 are positioned on opposite sides of the jaw 11, as shown in Fig. 1, and as shown most clearly in Fig. 3, said jaw and the end portions of said arms are apertured to receive a pivot pin 44, pivotally connecting the lever 39 to said jaw.

The arms 40 and 41 of lever 39 are formed with alined transverse apertures in the corner portion thereof to receive a pivot pin 45. A pair of substantially identical toggle links 46 and 47, are apertured at both ends, said links being positioned adjacent the outer surfaces of the arms 40 and 41 with the pivot pin 45 extending through one of the apertures of each of said links. The pin 45 is formed at each end with a circumferential groove to receive snap retaining rings 48 and 49.

The jaw is formed with a pair of transversely alined circular bosses Si) and 51, said bosses and jaw being bored to receive a pivot pin 52. The pin 52 is received in the apertures at the other ends of the links 46 and 47 and has its ends formed with circumferential grooves to receive retaining snap rings 53 and 54. It will be noted in Fig. l, that when the jaws 10 and 11 are closed, the pivot pin 44 is between and substantially alined with the pivot pins 45 and 52 in dead-center relationship.

The toggle action of the improved tool is apparent from a comparison of Figs. l and 3. As the handle 42 is swung away from the handle 43, the links 46 and 47 are swung on the pivot pin S2, and the pivot pin 44 is moved out of dead-center relationship with respect to pins 45 and 52 as the jaw 11 is simultaneously swung away from the jaw 10 on pivot pin 15.

A selected length of speedometer cable can be cut'by placing said cable transversely between the shearing blades 24 and 27 and moving the handle 42 toward the handle 43. To square an end portion of an extent of cable said end portion is placed longitudinally in the forming groove 36. Swinging the handle 42 toward the handle 43 causes the jaws 10 and 11 to exert compressive stresses of a very high order on the portion of cable in the groove 36, with the result that the cable assumes the squared contour of grooves 36 and 37.

If it is desired to attach one or more ferrules or iittings to a section of cable, the ferrules are slipped onto said cable and the ferrule to be crimped is then placed in a selected groove or 3S when the jaws 10 and 11 are opened. When the groove 20 is used, the end of the extent is positioned in abutment with the pin 21 and the fitting is moved into abutment with the end of the jaw 11, thus accurately positioning the fitting on the cable. By swinging the handle 42 toward handle 43, the fitting is crimped onto the cable with a squaring action.

The improved tool is strong and durable, simple in construction, and is portable and convenient to operate. It is obviousy that if desired the tool can be permanently mounted by iixing the jaw 10 to a suitable support if portability is not required. The improved tool is etiicient in operation and can be quickly disassembled and reassembled.

Various changes and modifications may be made without departing from the spirit of the invention, and all of such changes are contemplated, as may come within the scope of the claim.

What I claim is:

In a forming tool: a iirst jaw having an outer end portion and a handle portion remote from said outer end portion; a second jaw having an outer end portion; means pivotally connecting the second jaw to the rst jaw intermediate the handle and outer end portion of the latter; a toggle lever pivotally connected to a portion of said second jaw inwardly of the outer end of said jaw, said lever having an elongated handle portion cooperative with the handle portion of the first jaw for manipulation of the tool; a toggle link pivotally connected to a portion of the first jaw inwardly of the outer end portion thereof and to said toggle lever at a point spaced from the pivotal connection of said lever with said second jaw, the pivotal connection of said toggle lever with said jaw being located between the two pivots of said toggle link when the outer end portions of the jaws are in substantial abutment, intermediate adjacent portions of said jaws, and complementary forming dies between the pivotal connection of the jaws and the pivot of the toggle lever on the second jaw.

References Cited in the file of this patent UNiTED STATES PATENTS 499,638 Mellen June 13, 1893 651,896 Stooltire June 19, 1,381,024 Shaul .Tune 7, 1921 1,753,080 Zwilling et al, Apr. 1, 1930 2,086,400 Brenzer Tuly 6, 1937 2,103,074 Gardner Dec. 21, 1937 2,188,502 Emmons Jau. 30, 1940 2,305,994 Richards Dec. 22, 1942 2,368,906 Westman Feb. 6, 1945 2,369,180 Rosenthal Feb. 13, 1945 2,627,769 Anderson et al Feb. 10, 1953 FOREIGN PATENTS 565,478 France Jan. 28, 1924 

